<template>
  <div class="score-case">
    <div class="table">
      <table>
        <thead>
          <tr>
            <th>编号</th>
            <th>科目</th>
            <th>成绩</th>
            <th>考试时间</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody>
          <tr v-for="(item, index) in list" :key="index">
            <td>{{ item.id }}</td>
            <td>{{ item.subject }}</td>
            <td :class="{ red: item.score < 60 ? 'red' : '' }">
              {{ item.score }}
            </td>
            <td>{{ formDate(item.date) }}</td>
            <td><a href="#" @click.prevent="remove(item.id)">删除</a></td>
          </tr>
        </tbody>
        <!-- <tbody >
          <tr>
            <td colspan="5">
              <span class="none">暂无数据</span>
            </td>
          </tr>
        </tbody> -->
        <tfoot>
          <tr>
            <td colspan="5">
              <span>总分：{{sum}}</span>
              <span style="margin-left: 50px">平均分：{{average}}</span>
            </td>
          </tr>
        </tfoot>
      </table>
    </div>
    <div class="form">
      <div class="form-item">
        <div class="label">科目：</div>
        <div class="input">
          <input v-model="subject" type="text" placeholder="请输入科目" />
        </div>
      </div>
      <div class="form-item">
        <div class="label">分数：</div>
        <div class="input">
          <input v-model="score" type="text" placeholder="请输入分数" />
        </div>
      </div>
      <div class="form-item">
        <div class="label"></div>
        <div class="input">
          <button class="submit" @click="submit">添加</button>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
export default {
  name: "ScoreCase",
  data() {
    return {
      list: [
        {
          id: 15,
          subject: "语文",
          score: 89,
          date: new Date("2022/06/07 10:00:00"),
        },
        {
          id: 27,
          subject: "数学",
          score: 100,
          date: new Date("2022/06/07 15:00:00"),
        },
        {
          id: 32,
          subject: "英语",
          score: 56,
          date: new Date("2022/06/08 10:00:00"),
        },
        {
          id: 41,
          subject: "物理",
          score: 76,
          date: new Date("2022/06/08 10:00:00"),
        },
      ],
      subject: "",
      score: "",
    };
  },
computed:{
sum(){
  let sum=0
  this.list.forEach(e => {
    sum+=e.score
  });
  return sum
},
average(){
   let sum=0
  this.list.forEach(e => {
    sum+=e.score
  });
  return (sum/this.list.length)
}
},
  methods: {
    // 补零
    addZero(num) {
      return num < 10 ? "0" + num : num;
    },
    // 时间
    formDate(date) {
      // console.log(1);
      const year = date.getFullYear();
      const month = date.getMonth() + 1;
      const day = date.getDate();
      const hour = date.getHours();
      const min = date.getMinutes();
      const sec = date.getSeconds();
      return `${year}-${this.addZero(month)}-${this.addZero(
        day
      )} ${this.addZero(hour)}:${this.addZero(min)}:${this.addZero(sec)}`;
    },
    // 添加
    submit() {
      if (this.subject.trim() === "" || this.score.trim() === "") return;
      const obj = {
        id: this.list[this.list.length - 1].id + 1,
        subject: this.subject.trim(),
        score: Number(this.score.trim()),
        date: new Date(),
      };
      this.list.push(obj);
      this.subject = "";
      this.score = "";
    },
    // 删除
    remove(id) {
      this.list = this.list.filter((item) => item.id !== id);
    },
  },
};
</script>

<style lang="less">
.score-case {
  width: 1000px;
  margin: 50px auto;
  display: flex;
  .table {
    flex: 4;
    table {
      width: 100%;
      border-spacing: 0;
      border-top: 1px solid #ccc;
      border-left: 1px solid #ccc;
      th {
        background: #f5f5f5;
      }
      tr:hover td {
        background: #f5f5f5;
      }
      td,
      th {
        border-bottom: 1px solid #ccc;
        border-right: 1px solid #ccc;
        text-align: center;
        padding: 10px;
        &.red {
          color: red;
        }
      }
    }
    .none {
      height: 100px;
      line-height: 100px;
      color: #999;
    }
  }
  .form {
    flex: 1;
    padding: 20px;
    .form-item {
      display: flex;
      margin-bottom: 20px;
      align-items: center;
    }
    .form-item .label {
      width: 60px;
      text-align: right;
      font-size: 14px;
    }
    .form-item .input {
      flex: 1;
    }
    .form-item input,
    .form-item select {
      appearance: none;
      outline: none;
      border: 1px solid #ccc;
      width: 200px;
      height: 40px;
      box-sizing: border-box;
      padding: 10px;
      color: #666;
    }
    .form-item input::placeholder {
      color: #666;
    }
    .form-item .cancel,
    .form-item .submit {
      appearance: none;
      outline: none;
      border: 1px solid #ccc;
      border-radius: 4px;
      padding: 4px 10px;
      margin-right: 10px;
      font-size: 12px;
      background: #ccc;
    }
    .form-item .submit {
      border-color: #069;
      background: #069;
      color: #fff;
    }
  }
}
</style>